Grate bar



Aug. 2,1927; 1 1,637,957

- A. C. MOTT, JR

GRATE BAR Filed April 7 1925 Patented Aug. 2, 1927.

UNITED STATES PATENT OFFICE.

ABRAM GQMOTT, JR.', OFPHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO ABRAM COX STOVE COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENN- SYLVAN IA.

enA'rE BAR.

Application filed April 7, 1925. Serial no. 21,394.

One object of this invention is to design a grate bar to be used in furnaces burning coal of small sizes.

A further object of the invention is to reduce the cost of manufacturing grate bars of this type by so designing the bars that they can be cast without the use of cores.

A further object of the invention is to make the grate bars so that the particles of coal cannot pass through the'air passage between the ribs of the bars.

In the accompanying drawings:

Fig. 1 is a plan view of my improved grate bar; a

Fig. 2 is a side view;

Fig. 3 is a longitudinal sectional view on the line 3-3, Fig. 1;

Fig. 4: is a transverse sectional view on the line 4t, Fig. 1; and

Fig. 5 is a sectional perspective view, showing one end of a grate bar.

In the drawings, one section is shown. The section can be of any length desired without departing from the invention.

The grate bar 1 consists of a single casting made without the use of cores. The bar has two series of longitudinal ribs 2 and 3, which are spaced apart, as shown. The series of ribs are on different planes. The upper series is located directly over the spaces between the ribs of the lowerseries. The spaces between the ribs of both series are wider than the 'ribs to allow for casting without the use of cores.

Two of the ribs of the lower series 3 are much deeper than the intermediate rib. forming strengthening webs 4t, which extend from one section 5 to theother end section 1. The upper series of ribs 2 extend over 40 the end sections 5 and are connected to the end sections, as shown in the drawings.

The bar is provided with one or more transverse connecting members 6, which strengthen the bar and provide firm supports for the upper series of ribs.

I claim 1. A grate bar made of a single casting and having two series of spaced longitudinal ribs on. different planes, the lower surfaces of one series being above the upper surfaces of the other series, the ribs of the upper series being above the spaces between the ribs of the lowerseries; and end sections at the ends of said ribs formed integrally therewith.

2. A grate bar made of a single casting and having two series of spaced longitudinal ribs on different planes, the lower surfaces of one series being above the'upper surfaces of the other series, the ribs of the upper series be ing above the spaces between the ribs of the lowerseries; end sections at the ends of said ribs formed integrally therewith, and certain of the ribs of the lower series being extended to form deep strengthening webs ex tending from one end section to the other.

3. A grate bar made of a single casting and having two series of spaced longitudinal ribs on different planes, the lower surfaces of one series being above the upper surfaces of the other series, the ribs of the upper series being above the spaces between the ribs of the lower series; end sections at the ends of said ribs formed integrally therewith, and an intermediate transverse connectingmember and deep strengthening webs extending from one end see A tion to the other.

ABRAM C. MOTT, J R. i 

